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- Hagsand, Angelica, 1985, et al.
(author)
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Effect of the degree of alcohol intoxication on eyewitness memory for a violent crime: Identification accuracy in lineup
- 2011
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In: Oral presentation at The Nordic Network for Psychology and Law (NNPL), September 16-17 2011, Oslo, Norway.
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Conference paper (other academic/artistic)abstract
- Introduction and Aim. In Sweden, 50-70% of all violent crimes are alcohol related (BRÅ, 2007, 2009). Eyewitnesses are valuable to the Police since they have seen the event and many crimes lack technical evidence like DNA. Due to the limited studies in the area, this ongoing experimental study might give valuable knowledge to the legal system concerning the assessment of alcohol intoxicated eyewitnesses and the credibility of their testimonies. Methods. The participants (N = 120 when finished) consists of healthy adult students. The study uses a 3 x 2 between- participants design with random assignment to alcohol beverage (none vs. moderate vs. high dose,) and lineup presentation (target present vs. target absent). Consumption time is 15 minutes in a laboratory with living room design. A movie depicting a staged kidnapping is shown to the participants and after 30 minutes of distracting filler tasks the participants are interviewed. One week later, the participants are presented the simultaneous lineup in order to identify the culprit from the movie and are also interviewed in more detail about the crime scene. Results and Conclusions. The data collection is ongoing during the spring of 2011. To this date, data from half of the participants has been collected. Results concerning identification accuracy will be presented and discussed at the NNPL conference in Oslo in September 2011.
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| 2. |
- Dahlgren, Angelica
(author)
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Alcohol intoxicated eyewitnesses: Trustworthy or not? A literature overview.
- 2011
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In: In G.H. Gudjonsson, A. K. Newton & J.F. Sigurdsson (Eds.). Perceptions: Victims, offenders and witnesses.. - Göteborg. ; , s. 35-44
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Book chapter (other academic/artistic)abstract
- A large amount of violent crimes involves alcohol intoxicated eyewitnesses. There are few studies and guidelines how the legal system should asses the credibility of such witnesses, even though investigations depend on witnesses. The aim of this literature review is to identify the gaps in previous research and which questions that needs to be addressed in the future. An extensive search in the database PsychInfo was conducted to find studies concerning alcohol intoxicated eyewitnesses. Four published and one unpublished study was found in the narrow field of alcohol intoxicated eyewitnesses. The studies give some support to the alcohol myopia theory but since there are only a few studies, with diffrent designs, trends are difficult to identify. Further research is needed to investigate this new topic in the boarder between forensic psychology and alcohol research.
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| 3. |
- Dahlgren, Angelica, et al.
(author)
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Do Alcohol-dependent individuals with DRD2 A1 allele have an increased risk of relapse? A pilot study
- 2011
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In: Alcohol and Alcoholism. - : Oxford University Press (OUP). - 0735-0414 .- 1464-3502. ; 46:5, s. 509-513
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Journal article (peer-reviewed)abstract
- Aims: The TaqIA polymorphism of the dopamine D2 receptor (DRD2) gene has been extensively studied in relation to alcoholism, and the TaqI A1 allele appears to be over-represented in alcohol-dependent individuals. In a recent study, this allele has also been associated with a highly increased mortality rate in alcohol-dependent individuals. In the present study, we investigated whether the TaqI A1 allele of the DRD2 gene region was associated with a higher relapse rate in alcohol-dependent individuals. Methods: Adult women (n = 10) and men (n = 40) with a diagnosis of alcohol-dependence were recruited from two Swedish 12-step treatment units for alcoholism. Subjects were genotyped for the TaqIA polymorphism. On average, 11/2 year after the end of the treatment program, subjects were re-interviewed by using the alcohol-related items from the Addiction Severity Index follow-up version. Results: Thirty-three (66%) subjects self-reported relapse and 17 (34%) abstinence during the follow-up period. Thirty-sex percent (18/50) were carriers of the A1 allele of the DRD2 gene region, and 64% (32/50) were non-carriers. Among the carriers of the A1 allele, 89% (16/18) reported relapse in contrast to 53% (17/32) in the non-carriers (P = 0.01; odds ratio = 7.1). Conclusion: The present study is, to our knowledge, the first report of an association between the TaqI A1 allele and a substantially increased relapse rate. It should be emphasized that the number of subjects is relatively small, and this investigation should therefore be considered as a pilot study. © The Author 2011. Published by Oxford University Press on behalf of the Medical Council on Alcohol. All rights reserved.
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